Artificial tooth



UNITED STATES PATENT OFFICE.

ALFRED A. BLANDY, OF BALTIMORE, MARYLAND.

ARTIFICIAL T 00TH.

Speccaton of Letters Patent No. 16,433, dated January 20, 185'?.

To all whom it may concern:

Be it known that I, ALFRED A. BLANDY, of the city of Baltimore, in t-heState of Maryland, have invented a certain new and useful Improvement inthe Construction of Artificial Teeth, of which the following is a full,clear, and eXact description, reference being had to the accompanyingdrawing of the same, in which- Figure l, represents a view inperspective of a tooth embracing my improvement; Fig. 2, a verticaltransverse section of the same, and Fig. 8, a plan. Fig. 4, represents aplan of a partial set of block teeth with my improvement appliedthereto, and Fig. 5, a transverse sect-ion of the same.

The object of my invention is so to incase the teeth with the metal thatthey shall virtually form but one piece, thus rendering it utterlyimpossible for a tooth to work loose or drop out. This has heretoforebeen attempted by Goodyears hard rubber teeth as also by another byforming the tooth with a couple of channels in its fang and thenconnecting them together, but this it will readily be perceived isinoperative or at least defective because as the metal flows into thesechannels, the gas or air not having an avenue to escape by is forcedback to a certain distance until it is able to successfully oppose thefurther progress of the metal thus defeating the very object for whichthe connecting channel was there placed; to remedy which I construct myteeth with a channel (a) running vertically through them into which Iinsert a piece of wire made of alloyed tin which projects through it ateither end about 1g of an inch, and which upon the metal being pouredover the casting secures the positive union or connection of the toothwith the plate. The outer end of this pin may be afterward fused bymeans of a blowpipe to make it a headed bolt so as torivet each tooth asit were to the plates.

In order to effect a more positive union of the teeth with the plate, aneck (b) and side projections arey formed which are completely inclosedby the metal, the neck and sides being so shaped as to act as adovetail, thus rendering it morally impossible for the tooth to workloose or drop out, unless broken or the plate by some accident ruptured.

By this method block teeth can be secured in a better and more enduringmanner, and present a more elegant and finished appearance than by anyother known process. For this purpose the upper surface of the block isgrooved and perforated either in part or entirely through with aseriesof holes one for every tooth for the reception of a fusible pin, whichbeing melted by the liquid metal as it is poured in the flask insures aperfect metallic connection between each with the plate.

Around the upper edge of the block is accurately cut a narrow channel ina circular line, which forms the limit of the metal and another bond ofconnection between it and the plate there being a similar groove for thesame purpose in the rear side of the block. By these grooves the blockis firmly dovetailed in the metal of the plate thush rendering it atonce strong and neat.

I-Iaving thus described my invention what I claim as new and desire tosecure by Letters Patent is* Constructing artificial teeth with a hole(a) passing vertically through them for the reception of the moltenmetal, and with a neck (b) and projecting sides in the manner and forthe purposes set forth.

In testimony whereof I hereunto set my hand this 11th day of December1856.

ALFRED A. BLANDY.

Witnesses:

P. I-IANNAY, WM. B. SMITH.

